Fill the gap

Details
Written by: Stanko Milosev
Category: C#
Hits: 3218
Interesting (and fast) way to fill the gap between numbers: 

static void Main(string[] args)
{
  int[] gapNumbers = new int[] { 1, 3, 4, 7, 8, 10 };

  foreach (int number in FillTheGap(gapNumbers))
  {
	Console.WriteLine(number);
  }

  Console.ReadKey();
}

private static IEnumerable<int> FillTheGap(int[] gapNumbers)
{
  int prevNumber = 1;

  foreach (int number in gapNumbers)
  {
	if (prevNumber == number)
	{
	  yield return number;
	}
	else
	{
	  for (; prevNumber < number; prevNumber++)
	  {
		yield return prevNumber;
	  }
	  yield return number;
	}
	prevNumber++;
  }
}

POI: 

foreach (int number in FillTheGap(gapNumbers))